Papillary renal cell carcinoma with high-ABCC2 shows an immune-evasive profile associated with favorable response to immunotherapy.

ABSTRACT: The use of immune checkpoint inhibitors is a promising therapeutic strategy for metastatic papillary renal cell carcinoma (PRCC); however, predictive biomarkers remain limited. PRCCs with high ABCC2 expression represent an aggressive subset frequently associated with metastasis. The tumor microenvironment (TME) profile of these tumors remains poorly defined. This study aims to characterize the TME of PRCC in relation to its ABCC2 status. A discovery cohort of 157 ABCC2-high PRCCs, 156 ABCC2-low PRCCs, and 72 normal kidneys was evaluated. Using RNA sequencing data, immune cell composition, immune checkpoint markers, and immune signature scores were assessed. Validation was performed in an independent cohort (31 ABCC2-high, 36 ABCC2-low, and 15 normal kidneys) using RNA in situ hybridization

SUBMITTER: Castillo VF 

PROVIDER: S-EPMC12805615 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature